I'm new to this forum, thanks to let me in. Ok, i explain my problem, i bought a house 5 years ago. I discover there's no footing under the foundation and no french drain, therefore i have water infiltration from the bottom of the foundation. the foundation is directly on the clay. My question is, to build a footing do ineed to dig all around the house or just at certain places a the time? I'm afraid the foundation the foundation crush down if i dig all around at the same time. I hope you'll understand what i mean, i'm french so i manage with english but no 100% billigual.